It appears Elusive Disc has two types of these sleeves but no real way to know exactly what they are just looking online. Japanese 12" Vinyl Inner Sleeves (100 Pack) 12" Vinyl Inner Sleeves (100 Pack) This is a great hobby with some weird quirks. As far as the fogging, are we referring to the pressing marks that were notoriously on vinyl produced by RTI in the early and mid 2000s? I used to see this on quite a few albums. I can't remember the sleeve they came in but people said they were pressing marks left by the release compound IIRC. It never affected the SQ.